QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

9 km SSW of South Yuba City, CA

· 19 km deep · released about 54 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sutter County 2 kmYuba County 38 kmYolo County 45 kmColusa County 50 kmButte County 69 kmSacramento County 72 kmNapa County 82 kmPlacer County 83 kmNevada County 83 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.2 (md)
Depth
19 km below the surface
Felt
2 reports · strongest reported intensity I
Nearest
Sutter County, 2 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 180 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 54 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 280,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 54 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 39.0438, -121.6787. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sutter County, CA 2 km (1 mi) ENE of here earthquakes near Sutter County
Yuba County, CA 38 km (24 mi) SW of here earthquakes near Yuba County
Yolo County, CA 45 km (28 mi) NNE of here earthquakes near Yolo County
Colusa County, CA 50 km (31 mi) ESE of here earthquakes near Colusa County
Butte County, CA 69 km (43 mi) S of here earthquakes near Butte County
Sacramento County, CA 72 km (45 mi) NNW of here earthquakes near Sacramento County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

3 earthquakes have been recorded within 50 km since this one.

  1. 2.0 5 km E of Williams, CA
  2. 1.9 7 km ESE of Williams, CA
  3. 1.9 8 km WSW of Arbuckle, CA

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.